Withdrawing means for side-slip weft detectors



May 1, 1928.

- H. L. BLANCHARD WITHDRAWING MEANS FOR SIDE SLIP WEFT DETECTORS \FiledMay 25. 1926 Y 2 Sheets-Sheet 1 INvENToFe HAROLD L. BLANCHARDATIREDJFYQ,

May 1, 1928. 6 1,668,393 j I H. BLANCHARD WI 'i HDRAWING- MEANS FOR SIDESLJ IP WEFT DETECTORS Filed May 25. 1926 2 Sheets-Sheet 2 INVENTO Fe IHAROLD LA. Bg'fimmxan ATTORNEYS.

Patented May 1, 1928.

UNITED STATES PATENT oFFica.

HARonpL. BLANCIIARDQOI tnLLnnnY, MAssAoH SErT Assieivon To exemption &KNOWLES LOQM wons, or woncnsr'sa, MASSACHUSETTS, A ooaro aa'rion orMASSACHUSETTS.

WITHDBAWING MEANS eon Application filed May 25,

This invention relates to means for Withdrawingloom weft detectors 0]":the side slip type and it is the general object of the invention toimproveupon means heretofore used for accomplishing thisresult by a verysimple and inexpensive mechanism.

Weft detectors for multi-color automatic looms are usually located onthe magazine end ofthe loom and where they are of the type which enter aside wall of ithershnttle provision must be made forwithdrawing thedetector on transferring beats of the loom in order to provide a clearpath for the incoming full bobbin. This movement of the detector out ofthe pathof the bobbin must also be accomplished without giving a secondindication'to the magazine and it is a further object of myinvention toaccomplish these two results by a minimum of parts which shall be undercontrol of the transfer mechanism.

In the usual torm of multi-color we:ft.r e plenishingmechanismindication of weft es:- haustion is communicatedto the magazineby mea11s of a floating or actuator lever whichnormally has a downwardmovement on detecting beats of the loom, this movement beinginterrupted'by a so-called controller on indicating beats. It is afurther object of my invention to combinethe con- (roller for theactuator lever and the withdrawing device viforthe detector in one partso placed as to be under control ol the transferre r mechanism.

A more specific object of my invention is to provide a connection "forwithdrawing the detector-by a device having somewhere in itslength asurplus amount or material whichcan'be used to atl'ordadjustments.

Nit-hthese and other objects inview which will a) iear as the descri)tion )roceeds m invention resides in the combination and arrangement ofparts hereinafter described andset :forth in the claims. 1

In the accompanying drawings wherein l have shown a convenientembodiment of my invention,

Fig. 1 is a top plan view of a detector embodying my invention, theshuttle and bobbin being indicated indotted lines and portions of themechanism being indicated in section,

Fig. 2 is a vertical section on line 22 of Fig. l,

SIDE-SLIP wnrr :oa rne'rons.

1926. Serial No. 111,661.

i 0 1 1g. 3 1s a front elevation on "a reduced scale of the structureshown in Fig. 1,

Fig. 4 a perspective view oi the with drawingmeans,

Fig. 5 is a section on line 5 and Fig. :6 is a fragmentary Ward portionof the withdrawing device after the loop therein has been contracted toafford a separating adjustment otthe two legs oit'the device.

Referring particularly to l, 2, and 3 it will be seen that I haveprovided a loomside lOand breast beam ll on which isdmounted the frame12 of a weft replenishing mechanism preferably of the multicolor typesuch as set forth intPatent No. 1,030,748. The frame 12 is provided witha stud 13.011 which pivotallv mounted. the hub l l of a transferrerlever 15 the rear bobbin engaging arm '16 of which extends over the.shuttle S and bobbin B when the lay ison front center. The transferrerarm has 5 of Fig. 1,

depending legs ,17 between which extends therein a block on..whichispivoted an actuator'lever 21 the inner end of which is connected to amagazine actuating I'Okl 2:2 and the other-end of which lies ill slot 23formed in the stand. \Vhrn there is sufiicient Weft present forcontiniua'l wezzv ing the actuator lever ill will be tree to descend inslot 23,:but when insnliiii'ient welt is present a controller pinQ-lwill' be under the outer end of the actuator lever 21 and as theblock 20 dcscemlsrod will be given a down 'ard'. movement to initiatereplenishment. The matter. thus tardescribed is of common constructionand may be set forth in the aforesaid patent, the only 'difierenc-ebeing that controller pin 24 is somewhat different from that shown inthe aforesaid i patent;

In carrying out my invention I provide which passes through a verticalslot 34 lower portion of a detector housing the upper part of which isprovided by a cap 37. The support is provided with a boss 38 and issurrounded for the most part by an upstanding flange 89. Said flange isbro ken away at the rear right portion to define a shoulder 41 and thereis projecting inwardly from the left hand side of the flange a lug whichdelines a notch fll'i.

The detector which I employ is formed of single piece of wire D bent atthe rear portion thereof and having teeth 14: cut therein, the forwardlyextending portion of the wire being curved as indicated in Fig. 1 andnormally lying in contact with shoulder l1. Said wire is provid( d witha bent portion 45 and. a. straight portion extending to the left asindicated at 16. The extreme forward end of the wire is formed as apivot indicated 47 so proportioned as to be received in notch Thedistance between the right hand portion of the bend 45 and the left endof the detector is slightly less than the distance between the insideside walls of the flan e 39, the purpose of this construction being toprevent undue lateral movement of the detector. The forward portion ofthe wire is provided with a crimp 4.8 which receives the forward end ofa coil spring 49 the rear end of which is received by a projection 50cast on the support. The normal function of the spring 49 is to hold thepivot portion 47 in the notch 43 and the curved rearwardly extendingpart of the detector against shoulder 41 thus positioning said detectorfor proper engagement with the surface to be detected.

In carrying my invention into further effect I provide a withdrawingwire TV having a right hand leg provided with an open hook 61 whichengages both sides of that portion of the detector D located between theend 47 and crimp dB. The portion 36 is provided with a wall or shoulder62 which guides the lower end of the hook to preventmovement to the leftas viewed in Fig. 1. The cap 37 prevents upward displacement of the leg(30 and the latter is therefore held against improper vertical andlateral movement to the left.

The other leg 68 of the withdrawing device terminates in the controller24, passing into a portion of stand 19 so that the controller 24normally lies under actuator 21. The withdrawing wire is formed as onepiece and the forward portion thereof is looped as at (34:, the sides ofthe loop being in substantial alignment and being so placed as to beengaged by one of the legs 17 of the transferrer lever.

Under normal conditions the parts will be in the. position indicated infull lines in Fig. 1 and as the shuttle and bobbin advance the teeth 4stwill be'embedded in the yarn and the detector D will move forwardly fromthe full line posit-ion indicated in Fig. 1 without angular movement.The said detector moves the wires 1V forwardly to withdraw thecontroller 24 from under actuator lever 21 so that the latter is free todescend without interruption. lVhen insuliicient yarn for continuedweaving is present, however, the teeth 4% will slide along the emptybobbin to the dot and dash line position indicated in Fig. 1, thedetector D under these conditions moving around the notch d3 as a pivot.The hook 61 is so near the notch that the angular movement of thedetector produces no appreciable effect on the controller 24 and thelatter therefore remains under the actuator lever 21 to interrupt thedownward movement of the latter and initiate replen,

ishment.

On a subsequent beat of the loom when the exhausted shuttle againarrives under the magazine the transferrer arm will be moved downwardlyby mechanism not shown and one of the legs 17 will engage the wire V andmove the same forwardly to the dotted line position indicated in Fig. 2,this motion of the transferrer moving the detector D to the dotted lineposition indicated in Fig. 1 to clear the path of the incoming bobbinand also moving the controller pin 2st from under the actuator lever 21so that the latter may descend without repeating the indication.

It occasionally occurs that the detector must be adjusted longitudinallywith respect to the bobbin and shuttle, this adjustment being permittedby the slot 32 but in asmuch as stand 19 remains fixed it is necessaryto provide some adjustment to vary the distance between the legs 60 and63. This can be done by spreading the legs apart or drawing them closertogether as the case may e, the loop Gel either contracting or beingenlarged according to which adjustment is made. As indicated in Fig. 6the legs have been separated with a consequent contraction of the loop54:. Whatever the distance between the withdrawing and controller endsof the wire V, there will always be a portion which lies in the path andunder control of some part of the transferrer mechanism. For this reasonthe controller and detector will always be moved to inoperative positionon a transferring beat independent of the lateral position of thesupport 35.

From the foregoing it will be seen that I have provided a very simpledevice for withdrawing a side slip weft detector on transferring beatsof the loom, this device serving also as a controller for the actuatorlever. It will further be seen that the controller is normally inoperative position with respect to the actuator lever and that angularmovement of the detector produces a negligible movement on the part ofthe controller so that the latter is in operative position on ill! GJI

indicating beats of the 10cm. It willfurtherm'ore be seen that by meansof the surplus material afforded by the loop 64 I am enabled to vary thedistance between the legs and 63 when lateral adjustments of thedetector is necessary and thatfor all such adjustments the device isunder control of the transferring mechanism.

Having thus described my invention it will be apparent thatchanges andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and scope of the invention, and I do not wishto be limited to the details herein disclosed but what I claim is: V

1. In a loom weft detector having a yarn engaging element and a support,the element supported entirely by the support and being movableforwardly on the support when engaging a bobbin having sufficient weftand moving angularly about a portion of the support as a center along abob bin having insufficient weft, an actuator, transferrer mechanism,and a member operatively connected to and moving with the element whenthe latter has a forward nonindicating movement, said member having aportion normally in the path of the actuator, said portion beingwithdrawn when he element moves when in contact with sufficient weft andremaining in the path of the actuator when the element is in contactwith insufficient weft, the transferrer means engaging the member at thetime of transfer to withdraw the detector from the path of the incomingbobbin, and said portion from the path of the actuator.

2. In a loom weft detector having a yarn engaging element and a support,the element supported entirely by the support and being movableforwardly on the support when engaging a bobbin having sufficient weftand moving angularly about a portion of the support as a center along abobbin having insufficient weft, an actuator, and a controller for theactuator moving with the element when the latter has a forwardnonindicating movement, said controller o -er-- atively connected to theelement at a point closely adjacent the center about which the elementmoves when in contact with an insuflicient supply of weft.

3. In a loom weft detector having a yarn engaging element and a support,the element supported entirely by the support and being movableforwardly on the support when engaging a bobbin having suihcient weftand moving angularly about a portion of the support a center along a.bobbin having insufficient weft, resilient means to hold the element innormal bobbin engaging position, an actuator to effecta change in theoperation of the loom, and a member common to the element and actuatormoving with the element when the latter has a for- 4. In a loom weftdetector having a yarn engaging element and a support, the element beingmovable forwardly on the sup- )ort when en a in a bobbin havin suffi- Cb C) cient weft and moving angularly about a portion of the support as acenter along a bobbin harm insuiiicient weft resilient nea'ns to'holdthe element in normal bobbin engaging position, an actuator to effect achange in the operation of the loom, and a member common to the elementand actuator and lying in the path of the latter when the element movesangularly when in contact with an insufficient supply of weft, saidyielding means being operative to hold the member normally in the pathof the actuator, said member being formed with a contractable andexpansible part, whereby the distance between the actuator and elementengaging portions thereof may be varied.

5. In a loom weft detector having a yarn engaging element and a support,the element being movable forwardly on the support when engaging abobbin having sufiicient weft and moving angularly about a portion ofthe support as a center along a bobbin having insufficient weft,resilient means to hold the element in normal bobbin engaging position,an actuator to effect a change in the operation of the loom, and amember common to the element and actuator and lying in the path of thelatter when the element moves angularly when in contact with aninsufficient supply of weft, said yielding means being ope "ative tohold the member normally in the path of the actuator, said member beingformed as a wire having a loop formed therein which may be contracted orexpanded to increase or diminish the distance between the actuator andelement engaging portions of said member.

6. In a loom weftdetector having a yarn engaging element and a support,the element supported entirely by the support and being movableforwardly on the support when en gaging a bobbin having sufficient weftand moving angularly about a portion of the support as a center along abobbin having insufficient weft, an actuator to effect a change in theoperation of the loom, a transferrer, and a member acting both as acontroller means for the actuator and a withdrawing means for theelement when said member is engaged by'the transfer-rel, said membermoving with the element when the latter has a forward non-indicatingmovement and remaining under the actuator when insufficient weft forcontinued weaving is in contact with the detector to effect a change inthe operation of the loom.

7. In a loom weft detector having a yarn engaging element and a support,the element formed of a single piece of wire supported entirely by thesupport and being movable forwardly on the support when engaging abobbin having suiiicient weft and moving angularly about a portion ofthe support as a center along a bobbin having insufficient weft, anactuator to efl'ect a change in the loom and a member common to the.actuator and element and comprising a single piece of wire operativelyconnected to the element at a point closely adjacent the pertion of thesupport about which the element moves as a center, said member mow ingforwardly when the element is in contact with sufiicient weft so thatsaid member is out of operative engagement with the actuator and saidmember remaining substantially at rest because of its location withrespect to the point about which the element turns when the latter is inengagement with an insufiicient supply of weft, the member in the latternamed position being operatively disposed with respect to the actuator.

In testimony whereof I have hereunto atfixed my signature.

HAROLD L. BLAIQCHrrl-ID.

